canvas
{
    background-color:#33cc99;
    
    display: block;
    margin: 0 auto;
    margin-top: 50px;
}
h2{
   margin-left: 400px;
}
.btn1{
    height: 100px;
    width: 100px;
    color:#33cc99;
    font-size: 20px;
    position: fixed;
    top: 120px;
    left: 300px;
}
button:nth-of-type(2){
    top: 240px;
}
button:nth-of-type(3){
    top: 360px;
    font-size: 15px;
}
